I have EDC'ed my G-20 for about 3 years now, and i love it as much as the 21 it replaced. I am considering getting an SF model, but with three glocks of the same frame size, its kinda hard to justify the expense. I am considering doing a grip reduction myself to get the SF effect and save the cash for brass and bullets. If it works, i may follow suit on the others. Has anyone seen/heard of anyone who mods the slides of fullsize glocks, specifically rounding ghe edges of the forward portion of the slide, similar to the compact models? Think there will be enough weight reduction to bother cycling?